2014 Winnebago Forza 38R GREAT FAMILY MOTORHOME! EMAIL FOR PRICE. Go Forward! It is time to go diesel with the all-new, pleasantly priced Winnebago Forza. The Freightliner XCS straight-rail chassis provides a solid foundation with a Cummins 340-horsepower diesel engine and Allison six-speed transmission delivering the power. Diesel pushers are known for storage and the Forza ups the ante with its Smart Storage design that pushes capacity even further. Inside, you will appreciate fine amenities such as polished Corian galley countertops, coffee glazed cabinetry, upscale entertainment features, and LED lighting. Take a stroll through the 34T and 38R and you will already be planning your first adventure in your new Winnebago Forza.